Perhaps you should try some spelling variations:
khoa quoc » hoa duoc, hoc quoc
khoa toc » hoa toc, khoa thuoc, khoa duoc
khoa hoc » hoa hoc
hieu khi » hieu chi, thieu nhi, khien khi
nhung bo » nhung bi, nhung bai, nhung don
khi cua » chi cua, thai cua
ho voi » hop voi, pho voi, hoc voi
bo ho » bao ho, bo hon, mo ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ((((khoa toc) or (khoa quoc))) or (khoa hoc)) hieu khi cua ets : nhung bo ho voi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((((khoa toc) OR (khoa quoc))) OR (khoa hoc)) hieu khi cua ets : nhung bo ho voi đai.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((((khoa toc) or (khoa quoc))) or (khoa hoc)) hieu khi cua ets : nhung bo ho voi đai*.